Question about air filter

I know this isn't an OFFU, but I was curious if anybody on here has a k&n airfilter on their truck. I've heard that it isn't good for your engine to have one on your truck because all of the dust that we drive through constantly. Just curious to see if anybody who has a k&n airfilter has had any problems from it

I am switching to one on my truck. I've had my truck for a year now and I have already went through 3 filters. From what I know is that all you need to do is spray it off and it's good as new. Hoping it works....